Because repeated dosing of temozolomide correlates with an improved response, which may be due to progressive depletion of the enzyme AT, our hope is that a daily oral schedule will be the most active schedule of this agent. In phase I studies doses below 85 mg/m2/day continuously have been well-tolerated. We plan to begin dosing at 75 mg/m2/day for 6 weeks out of an 8 week cycle and to escalate to 85 and 100 mg/m2/day in patients who have no grade 3/4 toxicity.